General Knowledge



Symbol: Cu,
Atomic Number — 29,
Mass Number — 64

Physical and Chemical Properties :
This is a tough, reddish colour metal whose specific gravity is 8.95, and its melting point and boiling point are 1083°C and 2310°C. It is malleable and ductile. This is a good conductor of heat and electricity.

Alloys of Copper

Alloys Composition Uses
Brass Cu + Zn Used in making idols, household utensils, etc.
German silver Cu+ Zn + Ni Used in making idols and utensils.
Bell metal Cu + Sn Used in making bells, utensils, idols, coins, etc.
Delta metal Cu + Zn Used in making propellers of ships, as resistant of sea water.

Compounds of Copper

Cupric Sulphate (CuSO)4 :
This is the main compound of copper, and it is also called blue vitriol (CuSO)4.5H2O. This is basically a solid crystalline substance of blue colour in water. A mixture of CuSO4.5H2O and Ca(OH)2 is called Bordeaux Mixture, and it is used as a fungicide.

Cuprous Oxide (Cu2O) :
This is a red colour solid substance, insoluble in water. It is obtained as a red precipitate by heating CuSO4 with glucose and NaOH solution.